Bump psycopg from 3.1.14 to 3.1.15

Bumps [psycopg](https://github.com/psycopg/psycopg) from 3.1.14 to 3.1.15.
- [Changelog](https://github.com/psycopg/psycopg/blob/master/docs/news.rst)
- [Commits](psycopg/psycopg@3.1.14...3.1.15)

---
updated-dependencies:
- dependency-name: psycopg
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -2,6 +2,6 @@ Django==4.2.7
 GitPython==3.1.40
 gunicorn==21.2.0
 protobuf==4.25.1
-psycopg==3.1.14
+psycopg==3.1.15
 whitenoise==6.6.0
 packaging==23.2